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Code Issues Releases Wiki Activity

[image][online_image][animation] Fix transparency in RGB565 (#7631)

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This commit is contained in:
Clyde Stubbs
2024-10-25 09:05:25 +11:00
committed by GitHub
parent 09f9d91577
commit 33fdbbe30c
15 changed files with 101 additions and 291 deletions
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13
esphome/components/image/__init__.py
View File

@@ -361,24 +361,21 @@ async def to_code(config):
elif config[CONF_TYPE] in ["RGB565"]:
image = image.convert("RGBA")
pixels = list(image.getdata())
data = [0 for _ in range(height * width * 2)]
bytes_per_pixel = 3 if transparent else 2
data = [0 for _ in range(height * width * bytes_per_pixel)]
pos = 0
for r, g, b, a in pixels:
R = r >> 3
G = g >> 2
B = b >> 3
rgb = (R << 11) | (G << 5) | B
if transparent:
if rgb == 0x0020:
rgb = 0
if a < 0x80:
rgb = 0x0020
data[pos] = rgb >> 8
pos += 1
data[pos] = rgb & 0xFF
pos += 1
if transparent:
data[pos] = a
pos += 1
elif config[CONF_TYPE] in ["BINARY", "TRANSPARENT_BINARY"]:
if transparent:

28
esphome/components/image/image.cpp
View File

@@ -88,7 +88,7 @@ lv_img_dsc_t *Image::get_lv_img_dsc() {
this->dsc_.header.reserved = 0;
this->dsc_.header.w = this->width_;
this->dsc_.header.h = this->height_;
this->dsc_.data_size = image_type_to_width_stride(this->dsc_.header.w * this->dsc_.header.h, this->get_type());
this->dsc_.data_size = this->get_width_stride() * this->get_height();
switch (this->get_type()) {
case IMAGE_TYPE_BINARY:
this->dsc_.header.cf = LV_IMG_CF_ALPHA_1BIT;
@@ -104,17 +104,17 @@ lv_img_dsc_t *Image::get_lv_img_dsc() {
case IMAGE_TYPE_RGB565:
#if LV_COLOR_DEPTH == 16
this->dsc_.header.cf = this->has_transparency() ? LV_IMG_CF_TRUE_COLOR_CHROMA_KEYED : LV_IMG_CF_TRUE_COLOR;
this->dsc_.header.cf = this->has_transparency() ? LV_IMG_CF_TRUE_COLOR_ALPHA : LV_IMG_CF_TRUE_COLOR;
#else
this->dsc_.header.cf = LV_IMG_CF_RGB565;
#endif
break;
case image::IMAGE_TYPE_RGBA:
case IMAGE_TYPE_RGBA:
#if LV_COLOR_DEPTH == 32
this->dsc_.header.cf = LV_IMG_CF_TRUE_COLOR;
#else
this->dsc_.header.cf = LV_IMG_CF_RGBA8888;
this->dsc_.header.cf = LV_IMG_CF_TRUE_COLOR_ALPHA;
#endif
break;
}
@@ -147,21 +147,21 @@ Color Image::get_rgb24_pixel_(int x, int y) const {
return color;
}
Color Image::get_rgb565_pixel_(int x, int y) const {
const uint32_t pos = (x + y * this->width_) * 2;
uint16_t rgb565 =
progmem_read_byte(this->data_start_ + pos + 0) << 8 | progmem_read_byte(this->data_start_ + pos + 1);
const uint8_t *pos = this->data_start_;
if (this->transparent_) {
pos += (x + y * this->width_) * 3;
} else {
pos += (x + y * this->width_) * 2;
}
uint16_t rgb565 = encode_uint16(progmem_read_byte(pos), progmem_read_byte(pos + 1));
auto r = (rgb565 & 0xF800) >> 11;
auto g = (rgb565 & 0x07E0) >> 5;
auto b = rgb565 & 0x001F;
Color color = Color((r << 3) | (r >> 2), (g << 2) | (g >> 4), (b << 3) | (b >> 2));
if (rgb565 == 0x0020 && transparent_) {
// darkest green has been defined as transparent color for transparent RGB565 images.
color.w = 0;
} else {
color.w = 0xFF;
}
auto a = this->transparent_ ? progmem_read_byte(pos + 2) : 0xFF;
Color color = Color((r << 3) | (r >> 2), (g << 2) | (g >> 4), (b << 3) | (b >> 2), a);
return color;
}
Color Image::get_grayscale_pixel_(int x, int y) const {
const uint32_t pos = (x + y * this->width_);
const uint8_t gray = progmem_read_byte(this->data_start_ + pos);

37
esphome/components/image/image.h
View File

@@ -17,24 +17,6 @@ enum ImageType {
IMAGE_TYPE_RGBA = 4,
};
inline int image_type_to_bpp(ImageType type) {
switch (type) {
case IMAGE_TYPE_BINARY:
return 1;
case IMAGE_TYPE_GRAYSCALE:
return 8;
case IMAGE_TYPE_RGB565:
return 16;
case IMAGE_TYPE_RGB24:
return 24;
case IMAGE_TYPE_RGBA:
return 32;
}
return 0;
}
inline int image_type_to_width_stride(int width, ImageType type) { return (width * image_type_to_bpp(type) + 7u) / 8u; }
class Image : public display::BaseImage {
public:
Image(const uint8_t *data_start, int width, int height, ImageType type);
@@ -44,6 +26,25 @@ class Image : public display::BaseImage {
const uint8_t *get_data_start() const { return this->data_start_; }
ImageType get_type() const;
int get_bpp() const {
switch (this->type_) {
case IMAGE_TYPE_BINARY:
return 1;
case IMAGE_TYPE_GRAYSCALE:
return 8;
case IMAGE_TYPE_RGB565:
return this->transparent_ ? 24 : 16;
case IMAGE_TYPE_RGB24:
return 24;
case IMAGE_TYPE_RGBA:
return 32;
}
return 0;
}
/// Return the stride of the image in bytes, that is, the distance in bytes
/// between two consecutive rows of pixels.
uint32_t get_width_stride() const { return (this->width_ * this->get_bpp() + 7u) / 8u; }
void draw(int x, int y, display::Display *display, Color color_on, Color color_off) override;
void set_transparency(bool transparent) { transparent_ = transparent; }